.2 Flashcards
Parts of a Curved Mirror
principal axis
vertex
center of curvature
imaginary line passing through the center of the sphere at the exact center of the mirror.
principal axis
point on the mirror’s surface where the principal axis meets the mirror is known as the
vertex
point in the center of the sphere from which the mirror was sliced is known as the
center of curvature, C
Halfway between the center of curvature and vertex is the
focal point, F
The distance between the vertex and the focal point is the
focal length, f.
There are two types of curved mirrors
convex and concave mirrors.
curved mirror wherein the reflecting surface is on the outer surface of the sphere so that the center of the mirror bulges towards the viewer
convex mirror
This type of mirror (convex) focuses light away from the focal point, which is why it is called a
diverging mirror.
In order to find where an image will be located if an object is placed in front of a mirror, a technique called
ray diagramming
——- in ray diagrams are usually represented by bold and thick arrows.
Objects
First, a reference ray starting from the object going parallel to the principal axis is drawn. It reflects through the focal point, F after it hits the mirror.
This is called the principal ray
The second reference ray goes through F and then goes parallel to the principal axis after hitting the mirror. This is called the
focal ray
The third reference ray goes through C then goes back along with itself through C. This is called the
This is called the central ray.
The intersection of two or more rays locates the
image